Nokia Hands free CARK91 wiring

I know this might be a bit off the topic but was wondering it anyone could
help with the abbreviations found on the side of the box for the power
connection cable p/n PCH-4J, supplied with a Nokia hands free car kit CARK
91.
Blue wire......IGNS ........Is this ignition?
Green wire.....AMC ......What is this?
Yellow wire....CRM .......Is this for radio/CD mute?
Thanks
B

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